Unable to log onto Concur mobile app

Hi, I just downloaded the Concur mobile app on iPhone and received a company CODE SIGN IN. Once I put that in, the app goes to a blank page and stays there. See attached. I returned to the sign in page and attempt to sign in with my work email address and hit sign in, the app goes to the same blank page and stays there as well. I have tried re-installing to no avail. Please help.